It's used by edgy 12 year old degenarets who still whines about how Istanbul is Constantinople and doesn't thinks Turks are human beings
+Hi where are you from?
-Turkey +Eww gib back Constantinople you turkroach(s) killed 326857325872560975853758395735835837539858035 Armenian REEEEEEEEEEEEEEEEEEEEEEE!
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.